Abstract
The relief of joint pain is one of the main objectives in the clinical management of arthritis. Although significant strides have been made in improving management of rheumatoid and related forms of inflammatory arthritis, there are still major unmet needs for therapies that selectively provide potent, sustained and safe joint pain relief, especially among patients with osteoarthritis (OA), the most common form of arthritis. We have recently developed ProGel-Dex, an N-(2-hydroxypropyl) methacrylamide (HPMA) copolymer-based thermoresponsive dexamethasone (Dex) prodrug, which forms a hydrogel upon intra-articular administration and provides sustained improvement in pain-related behavior and inflammation in rodent models of arthritis. The focus of the present study was to investigate the impact of ProGel-Dex formulation parameters on its physicochemical properties and in vivo efficacy. The results of this study provide essential knowledge for the future design of ProGel-Dex that can provide more effective, sustained and safe relief of joint pain and inflammation.
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